1F51

A TRANSIENT INTERACTION BETWEEN TWO PHOSPHORELAY PROTEINS TRAPPED IN A CRYSTAL LATTICE REVEALS THE MECHANISM OF MOLECULAR RECOGNITION AND PHOSPHOTRANSFER IN SINGAL TRANSDUCTION

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1f51a_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
B	d1f51b_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
C	d1f51c_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
D	d1f51d_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
E	d1f51e_	Alpha and beta proteins (a/b)	Flavodoxin-like	CheY-like	CheY-related	Sporulation response regulator Spo0F	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
F	d1f51f_	Alpha and beta proteins (a/b)	Flavodoxin-like	CheY-like	CheY-related	Sporulation response regulator Spo0F	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
G	d1f51g_	Alpha and beta proteins (a/b)	Flavodoxin-like	CheY-like	CheY-related	Sporulation response regulator Spo0F	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
H	d1f51h_	Alpha and beta proteins (a/b)	Flavodoxin-like	CheY-like	CheY-related	Sporulation response regulator Spo0F	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	CheY-like	8038113	3001156	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	CheY-like	8038113	3001156	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	CheY-like	8038113	3001156	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	CheY-like	8038113	3001156	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF14682,PF14689	e1f51A1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: PF14682,PF14689	ECOD (1.6)
B	PF14682,PF14689	e1f51B1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: PF14682,PF14689	ECOD (1.6)
C	PF14682,PF14689	e1f51C1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: PF14682,PF14689	ECOD (1.6)
D	PF14682,PF14689	e1f51D1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: PF14682,PF14689	ECOD (1.6)
E	PF00072	e1f51E1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: PF00072	ECOD (1.6)
F	PF00072	e1f51F1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: PF00072	ECOD (1.6)
G	PF00072	e1f51G1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: PF00072	ECOD (1.6)
H	PF00072	e1f51H1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: PF00072	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
A	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	CATH (4.3.0)
B	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
B	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	CATH (4.3.0)
C	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
C	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	CATH (4.3.0)
D	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
D	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	CATH (4.3.0)
E	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
F	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
G	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
H	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF14682	Sporulation initiation phospho-transferase B, C-terminal (SPOB_ab)	Sporulation initiation phospho-transferase B, C-terminal	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domai ...	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domain, represented by this family. Two subunits of Spo0B dimerise by a parallel association of helical hairpins to form a novel four-helix bundle from which the active histidine - involved in the auto-phosphorylation - protrudes. In the phospho-relay, the signal-receptor histidine kinases are dephosphorylated by a common response regulator, Spo0F. Spo0B then takes phosphorylated Spo0F as substrate hereby mediating the transfer of a phosphoryl group to Spo0A, the ultimate transcription factor.	Domain
A, B, C, D	PF14689	Sensor_kinase_SpoOB-type, alpha-helical domain (SPOB_a)	Sensor_kinase_SpoOB-type, alpha-helical domain	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domai ...	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domain. Two subunits of Spo0B dimerise by a parallel association of helical hairpins to form a novel four-helix bundle from which the active histidine - involved in the auto-phosphorylation - protrudes. In the phospho-relay, the signal-receptor histidine kinases are dephosphorylated by a common response regulator, Spo0F. Spo0B then takes phosphorylated Spo0F as substrate thereby mediating the transfer of a phosphoryl group to Spo0A, the ultimate transcription factor. The exact function of this alpha-helical domain is not known; it does not always occur just as the N-terminal domain of SPOB_ab, Pfam:PF14682. SCOP describes this domain as a histidine kinase-like fold lacking the kinase ATP-binding site.	Domain
E, F, G, H	PF00072	Response regulator receiver domain (Response_reg)	Response regulator receiver domain	This domain receives the signal from the sensor partner in bacterial two-component systems. It is usually found N-terminal to a DNA binding effector domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	SPORULATION INITIATION PHOSPHOTRANSFERASE B	catalytic activity, acting on a protein small molecule sensor activity kinase activity protein kinase activity transferase activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups phosphorelay sensor kinase activity catalytic activity	sporulation resulting in formation of a cellular spore developmental process anatomical structure morphogenesis anatomical structure formation involved in morphogenesis anatomical structure development sporulation	intracellular anatomical structure cytoplasm cellular anatomical entity
E, F, G, H	SPORULATION INITIATION PHOSPHOTRANSFERASE F	kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups cation binding ion binding binding metal ion binding small molecule binding	phosphorylation cellular metabolic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process cellular response to stimulus regulation of biological process phosphorelay signal transduction system regulation of cellular process response to stimulus signaling biological regulation intracellular signal transduction phosphorylation cellular metabolic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process cellular response to stimulus regulation of biological process phosphorelay signal transduction system regulation of cellular process response to stimulus signaling biological regulation intracellular signal transduction cell communication signal transduction sporulation resulting in formation of a cellular spore developmental process anatomical structure morphogenesis anatomical structure formation involved in morphogenesis anatomical structure development sporulation	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR039506	SpoOB, alpha-helical domain	Domain
A, B, C, D	IPR037100	Sporulation initiation phosphotransferase B, C-terminal domain superfamily	Homologous Superfamily
A, B, C, D	IPR016122	Sporulation initiation phosphotransferase B, C-terminal	Domain
A, B, C, D	IPR016120	Signal transduction histidine kinase, sporulation regulator SpoOB	Homologous Superfamily
E, F, G, H	IPR011006	CheY-like superfamily	Homologous Superfamily
E, F, G, H	IPR001789	Signal transduction response regulator, receiver domain	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.